Probing Jovian decametric emission with the long wavelength array station 1

被引：10

作者：

Clarke, T. E. ^{[1
]}

Higgins, C. A. ^{[2
]}

Skarda, Jinhie ^{[3
]}

Imai, Kazumasa ^{[4
]}

Imai, Masafumi ^{[5
]}

Reyes, Francisco ^{[6
]}

Thieman, Jim ^{[7
]}

Jaeger, Ted ^{[8
]}

Schmitt, Henrique ^{[1
]}

Dalal, Nagini Paravastu ^{[9
]}

Dowell, Jayce ^{[10
]}

Ellingson, S. W. ^{[11
]}

Hicks, Brian ^{[1
]}

Schinzel, Frank ^{[10
]}

Taylor, G. B. ^{[10
]}

机构：

[1] Naval Res Lab, Washington, DC 20375 USA

[2] Middle Tennessee State Univ, Dept Phys & Astron, Murfreesboro, TN 37130 USA

[3] Stanford Univ, Dept Elect Engn, Stanford, CA 94305 USA

[4] Kochi Natl Coll Technol, Dept Elect Engn & Informat Sci, Kochi, Japan

[5] Kyoto Univ, Dept Geophys, Kyoto, Japan

[6] Univ Florida, Dept Astron, Gainesville, FL 32611 USA

[7] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[8] Johns Hopkins Univ, Appl Phys Lab, Laurel, MD USA

[9] Naval Res Lab, ASEEE, Washington, DC 20375 USA

[10] Univ New Mexico, Dept Phys & Astron, Albuquerque, NM 87131 USA

[11] Virginia Polytech Inst & State Univ, Bradley Dept Elect & Comp Engn, Blacksburg, VA 24061 USA

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS | 2014年 / 119卷 / 12期

基金：

美国国家科学基金会;

关键词：

COMPLETE POLARIZATION STATE; ELECTRON-CYCLOTRON MASER; RADIO EMISSIONS; DYNAMIC SPECTRA; MILLISECOND BURSTS; IO; JUPITER; VOYAGER; EVENTS; STORMS;

D O I：

10.1002/2014JA020289

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

New observations of Jupiter's decametric radio emissions have been made with the Long Wavelength Array Station 1 (LWA1), which is capable of making high-quality observations as low as 11 MHz. Full Stokes parameters were determined for bandwidths of 16 MHz. Here we present the first LWA1 results for the study of six Io-related events at temporal resolutions as fine as 0.25 ms. LWA1 data show excellent spectral detail in Jovian DAM such as simultaneous left-hand circular (LHC) and right-hand circular (RHC) polarized Io-related arcs and source envelopes, modulation lane features, S-burst structures, narrow band N events, and interactions between S bursts and N events. The sensitivity of the LWA1 combined with the low-radio-frequency interference environment allow us to trace the start of the LHC Io-C source region to much earlier CML III than typically found in the literature. We find that the Io-C starts as early as CML III = 230 degrees at frequencies near 11 MHz. This early start of the Io-C emission may be valuable for refining models of the emission mechanism. We also detect modulation lane structures that appear continuous across LHC and RHC emissions, suggesting that both polarizations may originate from the same hemisphere of Jupiter. We present a study of rare S bursts detected during an Io-D event and show that drift rates are consistent with those from other Io-related sources. Finally, S-N burst events are seen in high spectral and temporal resolution and our data strongly support the cospatial origins of these events.

引用

页码：9508 / 9526

页数：19

共 62 条

[1] VOYAGER OBSERVATIONS OF JOVIAN MILLISECOND RADIO-BURSTS [J].